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Finding the Fourth Proportional to 3,125.70, 4,689.85 and 1,369.80

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Solution

The fourth proportional to 3,125.70, 4,689.85 and 1,369.80 is: 2,055.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.70 : 4,689.85 = 1,369.80 : x
  2. Step 2: Convert to fraction form
    3,125.70/4,689.85 = 1,369.80/x
  3. Step 3: Cross multiply
    3,125.70x = 4,689.85 × 1,369.80
  4. Step 4: Simplify right side
    3,125.70x = 6,424,158.24
  5. Step 5: Solve for x
    x = 6,424,158.24/3,125.70
  6. Step 6: Final answer
    x = 2,055.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.